I will keep this as short and to the point as possible. In the last month or so, I have been trying to implement the Phyrgian mode into some solos in order to add some uniqueness. So I learned the notes of the phrygian mode, and just tried to play A Phrigian in the key of A. For some strange reason, it just sounded way off. Using the interweb, I searched and searched for some info as to WHEN the phrygian mode should be used. But alas, there was not a single free resource available giving any info on the subject. That is why I made this lesson. It will tell you very simply (if you already know your major scale and phrygian mode) when to implement the mode for very effective, creative soloing.
Simply: whatever the 3rd note in the major scale of the key you are in is, that is the key the phrygian scale should be rooted in. For example, in the key of F, the first three notes of the major scale are F, G, and A. Therefore when in the key of F, you will want to use A Phrigian.
That is the main gist of it. Very simple. That works all along the neck, in every key. Just use the 3rd note of the major scale to root the phrigian mode. And something really cool I like to do is to start soloing with the major scale, and using the phryrgian mode to connect my solo to the major of the key one octave higher (I would tab this out but not really sure how).
And for the people out there who don't know their note names, whatever major key you are in, just move the root up four frets and you will be in prime phrygian position most of the time.
Thanks for reading. This is my first lesson so any and all criticism is welcome.